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IceJOKER [234]
3 years ago
14

Can someone pls help for brainlest

Mathematics
1 answer:
trapecia [35]3 years ago
5 0

Answer:

The area of the shaded region= 37.68

Step-by-step explanation:

Area of the outer circle= 2* 3.14* 36                 (Area of the circle=2\pir)

                                        =113.04

Area of the inner circle=2*3.14* 12

                                       =75.36

Area of the shaded region= Area of the outer circle- Area of the inner circle

                                             = 113.04- 75.36

                                               =37.68

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If 20 were added to each of the vlaues in a data set that originally had a standard deviation of 8, the standard deviation of th
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Answer:

False (I assume it's a true/false question)

Step-by-step explanation:

Standard deviation measures how spread out the data is.  If you add 8 to all the data values, the distribution of data moves to the right (on a graph) 8 units. The shifted data are no more and no less spread out than before.  The standard deviation does not change.

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A sequence is defined by the formula f(n+1)=f(n)-3. If f(4)=22, what is f(1)?
Vlad [161]
<h3>Answer: Choice C) 31</h3>

==============================================

Explanation:

The recursive rule

f(n+1)=f(n)-3

can be rearranged to

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after adding 3 to both sides

----------------

Now let's say we plug in n = 3

f(n) = f(n+1)+3

f(3) = f(3+1)+3

f(3) = f(4)+3

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Each time we keep adding 3 to get the previous term (since the original recursive rule says to subtract 3 to get the next term; we just go backwards of what the instructions say).

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